^○Aitaro Takimoto, Taro Aoba, Takehito Kato, Kazuhiro Hiramatsu, Yoshihisa Shibata, Motoi Yoshihara, Tadahiro Kamiya, Akira Ito (Department of General Surgery, Toyohashi Municipal Hospital)

^○Muneyuki Koyama¹, Yasuro Futagawa¹, Kyohei Abe¹, Masaru Kanehira¹, Tomoyoshi Okamoto¹, Katsuhiko Yanaga² (1.Department of Surgery, The Jikei University Daisan Hospital, Tokyo, Japan, 2.Department of Surgery, The Jikei University School of Medicine,Tokyo,Japan)

^○Yuta Yoshida, Ippei Matsumoto, Kohei Kawaguchi, Masataka Matsumoto, Takaaki Murase, Syumpei Satoi, Keiko Kamei, Takuya Nakai, Yoshifumi Takeyama (Department of Surgery, Kinki University , Osaka, Japan)

^○Naoki Takahashi, Kiyoshi Narita, Rie Sato, Hideo Suzuki, Hideki Machishi, Yoshikatsu Okada (Department of Surgery, Kuwana East Medical Center, Mie, Japan)

^○Dae Joon Park, Yung hun You, In Woong Han, Dong Wook Choi, Seong Ho Choi, Jin Seok Heo, Sunjong Han, Youngju Ryu (Department of General Surgery, Samsung Medical Center)

^○Dae Joon Park, Young-Ju Rhyu, Sun-Jong Han, Young-Hoon You, Sung-Ho Choi, Dong-Wook Choi, In-Woong Han, Jin-Seok Heo (Department of General Surgery, Samsung Medical Center)